Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface showing our new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The outermost broken line illustrates a display screen and forms no part of the claimed design. The remaining broken lines illustrate portions of the graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 